Here is the full list of all 24 Superflight achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Explore 100 maps.
Crash 300 times.
Crash 150 times.
Inverting the steering axis? Seriously, that's just wrong.
Gain all three praises in a single run.
Gain the "Godlike!" praise.
Gain 40.000 points in a single run.
Complete a 10.000 points combo.
Gain 20.000 points in a single run.
Explore 50 maps.
Loose 10.000 points in a crash.
Crash 50 times.
Explore 25 maps.
Enter the zen mode.
Enter a seed and create a map.
Gain the "So Close!" praise.
Reach the end of a map.
Gain 10.000 points in a single run.
Gain 5.000 points in a single run.
Complete a 5.000 points combo.
Complete a 1.000 points combo.
Complete your first run in Superflight.
Gain the "Awesome!" praise.
Travel through a portal.